| 摘要 |
PROBLEM TO BE SOLVED: To prevent the air-fuel ratio from becoming lean due to sticking of fuel to a wall surface, when opening a throttle in response to an acceleration request, in an air-fuel ratio control device of an internal combustion engine. SOLUTION: As a value of a purge correction factor FPG exists on the minus side, that is, as a purge correction of a fuel injection quantity is large, full open opening KTA of the throttle is restrained in a small value. An increase in a suction air flow rate is restrained by limiting the full open opening KTA, and reduction in the flow rate ratio between purge gas and suction air can also be relatively restrained. Thus, an increase in a fuel injection quantity can be restrained, in its turn, a shortage of wall surface sticking fuel can be restrained. COPYRIGHT: (C)2008,JPO&INPIT
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